Gearbox Life

The gearbox lifetime calculation is the expected lifetime for the internal gears with 90% reliability.

There are two calculation types. Type 1 uses an exponent of 10/3, and Type 2 uses an exponent of 3.

Type 1:

Type 2:

Symbol Description Units

L10h

Expected lifetime with 90% reliability

hours

L10N

Rated lifetime for the rated speed and torque

hours

nN

Rated speed for rated lifetime

rpm

nm

Mean speed of application

rpm

TN

Rated torque for rated lifetime

Nm

Tm

Mean torque of application

Nm

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